... These ideas converge with a growing body of evidence indicating that humans (Boldt & Yeung, 2015;Meyniel, Sigman, & Mainen, 2015;Navajas et al., 2017;Yeung & Summerfield, 2012) and other animals (Kepecs et al., 2008;Kepecs & Mainen, 2012) represent the uncertainty involved in decision making in the form of subjective confidence and that they use these representations adaptively to guide their behavior. For instance, people's ability to quantify uncertainty explains differences in learning across age groups (Nassar et al., 2016), and confidence in one's knowledge predicts study strategies (Bjork et al., 2013;Metcalfe & Finn, 2008;Mihalca et al., 2017;Nelson & Dunlosky, 1991;Thiede, 1999), individual differences in learning speed (Frömer et al., 2021), informationseeking (Desender et al., 2018;Fernbach et al., 2019;Wood & Lynch, 2002), and task selection (Carlebach & Yeung, 2020). Meanwhile, on a social level, confidence can be used to communicate uncertainty when sharing information (Bahrami et al., 2010;Bonaccio & Dalal, 2006;Pescetelli et al., 2016Pescetelli et al., , 2021. ...